Carrier 42C Series Product Data page 25

SYMBOL/SKETCH
LEGEND
Cv — Coefficient of Velocity
DX — Direct Expansion
ETO — Engineering to Order
*Check all system component pressure ratings (coils, values, pumps,
etc.) with manufacturer and any applicable local or national piping
codes prior to specifying system pressure rating.
PIPING COMPONENTS (cont)
DESCRIPTION
2-WAY MOTORIZED VALVE (25 PSI close
off differential pressure): Electric 2-position
flow control valve (open/closed). Normally
closed body with manual override lever.
Installed in supply line to unit.
Application — All standard control and valve
packages are based upon normally closed
valves (valve electrically powered open and
closed by spring return when electric power
removed). Manual override lever allows valve
to be placed in the open position for second-
ary (unit) flushing, constant water flow prior to
start-up, etc. Manual override is automatically
disengaged when valve is electrically acti-
vated. Consult factory for normally open
valve applications.
2-WAY MOTORIZED VALVE (150 PSI close
off differential pressure): Electric 2-position
flow control valve (open/closed). Normally
closed body with manual override lever.
Installed in supply line to unit.
Application — All standard control and valve
packages are based upon normally closed
valves (valve electrically powered open and
closed by spring return when electric power
removed). Manual override lever allows valve
to be placed in the open position for second-
ary (unit) flushing, constant water flow prior to
start-up, etc. Manual override is automatically
disengaged when valve is electrically acti-
vated. Consult factory for normally open
valve applications.
3-WAY MOTORIZED VALVE (25 PSI close
off differential pressure): Electric
2-position flow control valve (closed to coil/
open to bypass or open to coil/closed to
bypass). Normally closed with manual over-
ride lever. Installed in supply line to unit.
Application — Same comments as 2-way
motorized valve except with manual override
lever engaged the valve is open to both ports
and water flow will take the path of least resis-
tance through the valve package (not neces-
sarily 100% through the coil).
3-WAY MOTORIZED VALVE (150 PSI close
off differential pressure): Electric
2-position flow control valve (closed to coil/
open to bypass or open to coil/closed to
bypass). Normally closed with manual over-
ride lever. Installed in supply line to unit.
Application — Same comments as 2-way
motorized valve except with manual override
lever engaged the valve is open to both ports
and water flow will take the path of least resis-
tance through the valve package (not neces-
sarily 100% through the coil).
C FACTOR RATING
V
1 / 3 / PSI
2 4
3.5 3.5 300
4.9 10.3 300
4.0 4.0 300
4.9 4.9 300
STEAM
USE
F
YES
15
200
PSI
MAX.
240 NO
200 N/A
240 N/A
25